리눅스에 JDK 1.8 설치

리눅스에 jdk 설치 

AWS에 아마 기본으로 있을껀데 혹시나 싶어서 확인

[root@ip-172-31-9-0 ~]# java -version java version "1.7.0_151" OpenJDK Runtime Environment (amzn-2.6.11.0.74.amzn1-x86_64 u151-b00) OpenJDK 64-Bit Server VM (build 24.151-b00, mixed mode)

1.7이 있징ㅎㅎ (정~~~말 귀찮은 짓을 피하고 싶으면 기존에 있던거 삭제하자!!!)

근데 난 1.8을 쓰고 싶어서 yum으로 설치 할수 있는 jdk 확인

만약 없으면 직접 다운로드 받아서 설치해야한다.

[ec2-user@ip-172-31-9-0 ~]$ yum list java*jdk-devel Loaded plugins: priorities, update-motd, upgrade-helper Available Packages java-1.6.0-openjdk-devel.x86_64    1:1.6.0.41-1.13.13.1.77.amzn1    amzn-main java-1.7.0-openjdk-devel.x86_64    1:1.7.0.151-2.6.11.0.74.amzn1    amzn-main java-1.8.0-openjdk-devel.x86_64    1:1.8.0.151-1.b12.35.amzn1       amzn-updates

jdk 1.8 설치 시작

[ec2-user@ip-172-31-9-0 ~]$ yum install java-1.8.0-openjdk-devel.x86_64 Loaded plugins: priorities, update-motd, upgrade-helper You need to be root to perform this command.

하려 했지만 root에서 실행해야 한다고 하네..ㅎㅎ

설치 실패 메세지 : You need to be root to perform this command.

루트 권한으로 변경

[ec2-user@ip-172-31-9-0 ~]$ sudo su - Last login: Wed Dec  6 02:17:50 UTC 2017 on pts/0

root 에서 jdk 1.8 설치 시작

[root@ip-172-31-9-0 ~]#  yum install java-1.8.0-openjdk-devel.x86_64 Loaded plugins: priorities, update-motd, upgrade-helper amzn-main                                                | 2.1 kB     00:00 amzn-updates                                             | 2.5 kB     00:00 Resolving Dependencies --> Running transaction check ---> Package java-1.8.0-openjdk-devel.x86_64 1:1.8.0.151-1.b12.35.amzn1 will be                       installed --> Processing Dependency: java-1.8.0-openjdk(x86-64) = 1:1.8.0.151-1.b12.35.amz                      n1 for package: 1:java-1.8.0-openjdk-devel-1.8.0.151-1.b12.35.amzn1.x86_64 --> Processing Dependency: libawt_xawt.so(SUNWprivate_1.1)(64bit) for package: 1                      :java-1.8.0-openjdk-devel-1.8.0.151-1.b12.35.amzn1.x86_64 --> Processing Dependency: libawt_xawt.so()(64bit) for package: 1:java-1.8.0-ope                      njdk-devel-1.8.0.151-1.b12.35.amzn1.x86_64 --> Running transaction check ---> Package java-1.8.0-openjdk.x86_64 1:1.8.0.151-1.b12.35.amzn1 will be instal                      led --> Processing Dependency: java-1.8.0-openjdk-headless(x86-64) = 1:1.8.0.151-1.b                      12.35.amzn1 for package: 1:java-1.8.0-openjdk-1.8.0.151-1.b12.35.amzn1.x86_64 --> Running transaction check ---> Package java-1.8.0-openjdk-headless.x86_64 1:1.8.0.151-1.b12.35.amzn1 will                       be installed amzn-main/latest/filelists_db                            | 5.7 MB     00:00 amzn-updates/latest/filelists_db                         | 1.9 MB     00:00 --> Processing Dependency: copy-jdk-configs >= 1.1-3 for package: 1:java-1.8.0-o                      penjdk-headless-1.8.0.151-1.b12.35.amzn1.x86_64 --> Processing Dependency: lksctp-tools(x86-64) for package: 1:java-1.8.0-openjd                      k-headless-1.8.0.151-1.b12.35.amzn1.x86_64 --> Running transaction check ---> Package copy-jdk-configs.noarch 0:1.2-1.2.amzn1 will be installed ---> Package lksctp-tools.x86_64 0:1.0.10-7.7.amzn1 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================  Package                   Arch   Version                    Repository    Size ================================================================================ Installing:  java-1.8.0-openjdk-devel  x86_64 1:1.8.0.151-1.b12.35.amzn1 amzn-updates  12 M Installing for dependencies:  copy-jdk-configs          noarch 1.2-1.2.amzn1              amzn-main     13 k  java-1.8.0-openjdk        x86_64 1:1.8.0.151-1.b12.35.amzn1 amzn-updates 244 k  java-1.8.0-openjdk-headless                            x86_64 1:1.8.0.151-1.b12.35.amzn1 amzn-updates  39 M  lksctp-tools              x86_64 1.0.10-7.7.amzn1           amzn-main     89 k Transaction Summary ================================================================================ Install  1 Package (+4 Dependent packages) Total download size: 51 M Installed size: 143 M

다운로드 가 완료 됐고 설치 하겠냐고 물어볼꺼야

그럼 y 입력하고 enter!

다운로드한 패키지 압축 풀고 설치 시작!

Is this ok [y/d/N]: y Downloading packages: (1/5): copy-jdk-configs-1.2-1.2.amzn1.noarch.rpm           |  13 kB   00:00 (2/5): java-1.8.0-openjdk-1.8.0.151-1.b12.35.amzn1.x86_64. | 244 kB   00:00 (3/5): lksctp-tools-1.0.10-7.7.amzn1.x86_64.rpm            |  89 kB   00:00 (4/5): java-1.8.0-openjdk-devel-1.8.0.151-1.b12.35.amzn1.x |  12 MB   00:01 (5/5): java-1.8.0-openjdk-headless-1.8.0.151-1.b12.35.amzn |  39 MB   00:02 -------------------------------------------------------------------------------- Total                                               16 MB/s |  51 MB  00:03 Running transaction check Running transaction test Transaction test succeeded Running transaction   Installing : copy-jdk-configs-1.2-1.2.amzn1.noarch                        1/5   Installing : lksctp-tools-1.0.10-7.7.amzn1.x86_64                         2/5   Installing : 1:java-1.8.0-openjdk-devel-1.8.0.151-1.b12.35.amzn1.x86_64   3/5   Installing : 1:java-1.8.0-openjdk-headless-1.8.0.151-1.b12.35.amzn1.x86   4/5   Installing : 1:java-1.8.0-openjdk-1.8.0.151-1.b12.35.amzn1.x86_64         5/5   Verifying  : lksctp-tools-1.0.10-7.7.amzn1.x86_64                         1/5   Verifying  : copy-jdk-configs-1.2-1.2.amzn1.noarch                        2/5   Verifying  : 1:java-1.8.0-openjdk-devel-1.8.0.151-1.b12.35.amzn1.x86_64   3/5   Verifying  : 1:java-1.8.0-openjdk-1.8.0.151-1.b12.35.amzn1.x86_64         4/5   Verifying  : 1:java-1.8.0-openjdk-headless-1.8.0.151-1.b12.35.amzn1.x86   5/5 Installed:   java-1.8.0-openjdk-devel.x86_64 1:1.8.0.151-1.b12.35.amzn1 Dependency Installed:   copy-jdk-configs.noarch 0:1.2-1.2.amzn1   java-1.8.0-openjdk.x86_64 1:1.8.0.151-1.b12.35.amzn1   java-1.8.0-openjdk-headless.x86_64 1:1.8.0.151-1.b12.35.amzn1   lksctp-tools.x86_64 0:1.0.10-7.7.amzn1 Complete!

완료!

설치된것 확인.. 

[root@ip-172-31-9-0 jvm]# javac -version javac 1.8.0_151 ------------------------------------------ 설치된 디렉토리에 있는 jdk, jre.. [root@ip-172-31-9-0 jvm]# ll -ltr /usr/lib/jvm/ total 8 drwxr-xr-x 7 root root 4096 Oct 25 20:46 java-1.8.0-openjdk-1.8.0.151-1.b12.35.amzn1.x86_64 drwxr-xr-x 3 root root 4096 Nov 20 22:12 java-1.7.0-openjdk-1.7.0.151.x86_64 lrwxrwxrwx 1 root root   39 Nov 20 22:12 jre-1.7.0-openjdk.x86_64 -> java-1.7.0-openjdk-1.7.0.151.x86_64/jre lrwxrwxrwx 1 root root   27 Nov 20 22:12 jre-1.7.0 -> /etc/alternatives/jre_1.7.0 오늘(12월 7일)에 설치된 jdk 1.8 버전 lrwxrwxrwx 1 root root   25 Dec  7 04:46 java-1.8.0-openjdk -> java-1.8.0-openjdk.x86_64 lrwxrwxrwx 1 root root   50 Dec  7 04:46 java-1.8.0-openjdk.x86_64 -> java-1.8.0-openjdk-1.8.0.151-1.b12.35.amzn1.x86_64 lrwxrwxrwx 1 root root   34 Dec  7 04:46 java-openjdk -> /etc/alternatives/java_sdk_openjdk lrwxrwxrwx 1 root root   32 Dec  7 04:46 java-1.8.0 -> /etc/alternatives/java_sdk_1.8.0 lrwxrwxrwx 1 root root   26 Dec  7 04:46 java -> /etc/alternatives/java_sdk lrwxrwxrwx 1 root root   54 Dec  7 04:46 jre-1.8.0-openjdk.x86_64 -> java-1.8.0-openjdk-1.8.0.151-1.b12.35.amzn1.x86_64/jre lrwxrwxrwx 1 root root   24 Dec  7 04:46 jre-1.8.0-openjdk -> jre-1.8.0-openjdk.x86_64 lrwxrwxrwx 1 root root   29 Dec  7 04:46 jre-openjdk -> /etc/alternatives/jre_openjdk lrwxrwxrwx 1 root root   27 Dec  7 04:46 jre-1.8.0 -> /etc/alternatives/jre_1.8.0 lrwxrwxrwx 1 root root   21 Dec  7 04:46 jre -> /etc/alternatives/jre

설치된거 확인 했으면 java 실행해봐야지

간단한 helloworld 작성해서 실행해 보자.

HelloWorld java 파일 생성 [root@ip-172-31-9-0 ~]# echo "public class HelloWorld {" > HelloWorld.java [root@ip-172-31-9-0 ~]# echo "  public static void main(String[] args) {" >> HelloWorld.java [root@ip-172-31-9-0 ~]# echo "    System.out.println(\"Hello, World\");" >> HelloWorld.java [root@ip-172-31-9-0 ~]# echo "  }" >> HelloWorld.java [root@ip-172-31-9-0 ~]# echo "}" >> HelloWorld.java [root@ip-172-31-9-0 ~]# javac HelloWorld.java 컴파일된 class 파일 확인 [root@ip-172-31-9-0 ~]# ll total 8 -rw-r--r-- 1 root root 426 Dec  7 05:45 HelloWorld.class -rw-r--r-- 1 root root 115 Dec  7 05:45 HelloWorld.java 실행 [root@ip-172-31-9-0 ~]# java HelloWorld 에러 똿!!!!!!!!!!! Exception in thread "main" java.lang.UnsupportedClassVersionError: HelloWorld : Unsupported major.minor version 52.0         at java.lang.ClassLoader.defineClass1(Native Method)         at java.lang.ClassLoader.defineClass(ClassLoader.java:803)         at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)         at java.net.URLClassLoader.defineClass(URLClassLoader.java:442)         at java.net.URLClassLoader.access$100(URLClassLoader.java:64)         at java.net.URLClassLoader$1.run(URLClassLoader.java:354)         at java.net.URLClassLoader$1.run(URLClassLoader.java:348)         at java.security.AccessController.doPrivileged(Native Method)         at java.net.URLClassLoader.findClass(URLClassLoader.java:347)         at java.lang.ClassLoader.loadClass(ClassLoader.java:425)         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:312)         at java.lang.ClassLoader.loadClass(ClassLoader.java:358)         at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

javac와 java가 바라보는게 달라.. 그래서 컴파일은 1.8로 됐는데 실행은 1.7로 실행이 되는거지..

JAVA_HOME 설정 변경해주는건 아래 링크에서 확인하자.

http://carfediem-is.tistory.com/6

설정 변경하고 javac와 java가 일치하면 이렇게 정상적으로 실행이 되지

HelloWorld 실행 결과 Hello, World

이제 jdk 설치 했으니까 was 설정해보자